| Specimen ID | 1438336 |
| Group | Plants |
| Genus | Alternanthera |
| Species | philoxeroides |
| Common Name | alligatorweed |
| State | CA |
| County | Los Angeles |
| Locality | Rio Hondo, under San Gabriel Blvd bridge near Rosemead Blvd intersection. |
| Mapping Accuracy | Accurate |
| HUC8 Name | Los Angeles |
| HUC8 Number | 18070105 |
| HUC10 Name | Rio Hondo |
| HUC10 Number | 1807010503 |
| HUC12 Name | Alhambra Wash-Rio Hondo |
| HUC12 Number | 180701050303 |
| Map | |
| Collection Day | 5 |
| Collection Month | 10 |
| Collection Year | 1956 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker on small watercraft |
| Status | established |
| Reference 1 |
| Ref. Number: | 25610 |
| Author: | Calflora |
| Date: | 2021 |
| Title: | The Calflora Database: Information on California plants for education, research and conservation |
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| Comments | Calflora observation ID: xr174507 |
| Record Type | Literature |
| Freshwater/Marine | Freshwater |
